I am preparing a classroom exercise about what changes when an audio file is exported into different formats. The source would be a short generated instrumental, with the original retained throughout the exercise. Students would first describe what they hear before looking at any visual representation. I found <a href=https://sunofixer.top>mp3 to spectrogram</a> as a possible reference while planning the visual part. We would then compare documented export settings using the same passage and a consistent playback level. The lesson needs to distinguish an observation in the image from a claim about its cause. I am considering a worksheet that records what was heard, how it was exported, and remaining uncertainties. There would be no requirement to repair the clip or produce a supposedly perfect version. Students would record the software used for each export so that their comparison can be repeated later. Which comparison mistakes should I explain before students begin this exercise?

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